Steam-engine



(No Model.)

W. BRAMELD.

STEAM ENGINE UNITED STATES PATENT @Erica WILLIAM BRAMELD, OF PATERSON,NEW JERSEY.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 533,783, dated February5, 1895.

Application iiledjlpril 5,1892. Renewed duly 24, 1894.. Serial No.518,435. (No model.)

T0 all whom it may concern:

- Be it known that I, WILLIAM BRAMELD, of Paterson, in the county ofPassaic and State of N ew Jersey, have invented certain new and usefulImprovements in Stean1Engines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to an improvement in steam engines and moreparticularly to compound engines,the object of the invention being toproduce a compound engine which will be very economical in the use ofsteam and yet produce the desired results.

A further object is to produce a compound steam engine which shall besimple in construction, cheap to manufacture and effectual in theperformance of its functions.

A further object is to produce a simple compound engine which shall beequally adaptable for use as locomotive engines, marine engines,stationary engines, steam pumps and in fact all kinds of engines inwhich the piston has a reciprocating movement.

Iith these objects in view the invention consists in certain novelfeatures of construction and combinations and arrangements of parts ashereinafter set forth and pointed out in the claims.

In the accompanying drawings: Figure l is a side elevation of myimproved engine.

Fig. 2 is a horizontal sectional view of the en` gine, the engine bedand driven devices being shown in plan. Fig.3 is a view of one of thesectional packing rings showi ng the spring encircling it.

A represents an engine bed having uprights or standards B,-on whichlatter the engine C is located.

rIhe engine comprises an outer or low pressure cylinder D and an inneror high pressure cylinder E, the head of each cylinder being providedwith openings and stuffing boxes for the accommodation of pistonrods ashereinafter explained. i

A steam chest F is located at one side of the cylinder D and is providedwith the usual opening and stuffing box for the accommodation of thevalve rod. The outer cylinder D is made with a valve seat D whichprojects within the steam chest F, and communicating with the steamchest through the valve seat are two ducts or passages a, ct,the passageor duct c communicating at its other end with the front end of the inneror high pressure cylinder E and the passage or duct a communicating atits other end with the rear end of said high pressure cylinder.

Two ducts or passages b, Z1 communicate at their inner ends with thesteam chest at points on the valve seat located inwardly from the ductsor passages a, 1Q-the other or outer ends of said ducts or passages h,b', communicating with the respective ends of the outer or low pressurecylinder D. The exhaust communicates with the valve chest at c. A valveG is located within the steam chest F and adapted to slide on the valveseat D', said valve being made with a recess d adapted to alternatelyconnect the ducts or passages h, h with the exhaust c, and with apassage e, for the purpose which will be explained farther on.

Located within the vhigh pressure or inner cylinder E, is a piston Hprovided with a series of packing ringsfon its periphery. Se-

cured to the piston H isa piston rod H, which passes through the head ofthe cylinder and the packing boxes secured thereto, and is connected atits rear end with a block H-whih box is adapted to have a slidingmovement in Ways g in the uprights or frame B. The block H2 is providedwith rearwardly projecting lugs g between which one end of a pitman H3is pivotally connected, the other end of said pitman being connectedwith eccentrics H4 carried by the main shaft H5.

Located in the outer or low pressure cylin` der is a piston I. Thepiston I is provided on its periphery with packing rings 71,. A recess tis made in the inner face of the piston I, said recess being of suchlength as to leave a portion h2 about two inches wide adapted to bearagainst and slide on the exterior of the inner or high pressure cylinderE. Located within the recess 7L and encircling the cylinder E, is aseries of sectional rings ha, provided in their peripheries with groovesh4, in which grooves spiral springs h5 are placed. A follower h6 issecured to the rear end of the piston I, and adapted to .close therecess h. From the construction and arrangement of ICO the piston I asabove explained, it will be seen that said piston is provided with steamtight packings adapted to bear against the inner face of the cylinder Dand the outer face of the cylinder E. The construction and arrangementof the inner packing devices being very elastic, there will be verylittle' friction between the piston I and the cylinder E. Piston rods Iare secured to the piston I, prefer- `1o ably at diam etrically oppositepoints, and project through the head of the cylinder E and the packingboxes secured thereto, being secured at their rear ends to the slidingblock H2, as most clearly shown in Fig. 2.

A valve rod is secured to the valve G, and has a sliding bearing on apost or standard I2,-the rear end of said valve rod being connected witha pitma'n t2, which latter isconnected with an eccentric carried by themain zo Shaft.

The engine being constructed and arranged as above set forth operates asfollows: When the slide valve G is at the outer extremity of its throwsteam will pass from the steam chest,

through the' duct or passage ct, into the inner or high pressurecylinder E and act upon the piston H to driverit forward. At the sametime the ducts ct and b will be connected by the passage e in the valveG, so that the partially spent steam in the vforward end of the innercylinder E will be permitted to pass through the ducts or passages a',b, and e, into the rear end of the outer or loW pressure cylinder D andact upon the piston I. It

moves to the outer extremity of its throw,

live steam will be admitted to the inner or high pressure cylinder andat the same time partially spent steam from the opposite side of thehigh pressure piston will be made to act upon the low pressure piston inthe cylinder D. It will also be seen that when the valve G is at theouter extremity of its throw the spent steam in the outer end of the lowpressure cylinder D will exhaust through the duct or port b and recessCZ in the valve G. Wrhen the valve G is moved to the inner extremity ofits throw the live steam will flow through will be seen therefore thatwhen the Valve Gv pounding the steam or using it twice, thus u greatlyeconomizing the use ot' steam with a very sim'pleand cheap arrangementof apparatus.

The engine is adaptable for use for all purposes where a reciprocatingmovement of the piston is desired. A

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. The combination with a high pressure cylinder a concentriclowvpress'ure cylinder, and a single valve for admitting steam to both,of an outer piston an inner piston, the former havinga recessedinnerface, sectional packing rings located within said recess, and bearingagainst the periphery of the inner cylinder and springs also locatedwithin said recess and bearing on the sectional rings, substantially asset forth.

2. The combination with a high pressure cylinder and a concentric lovsTpressure cylinder and a single valve for admitting steam to both, of anouter piston and inner piston, the former having a recessed inner face,sectional packing rings located within said recess and bearing againstthe periphery of the inner cylinder, springs also located within saidrecess and bearing on thesectional rings, and two piston rods connectedat their inner ends to the outer piston and a single piston rodconnected to the inner cylinder the several rods being connected attheir outer ends to a single block or sliding head, substantially as setforth. y

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WILLIAM BRAMELD. lVitnesses:

GEORGE P. Soorr, CHARLEs FLINT.

